/* ========== 易美官网全局样式 ========== */
:root {
  --plum: #7c2d4e;
  --plum-dark: #5e213b;
  --plum-light: #a45273;
  --gold: #c19a3f;
  --gold-light: #e8d9b0;
  --ivory: #faf7f3;
  --cream: #f4ede4;
  --ink: #2c2530;
  --ink-soft: #6b6172;
  --line: #e9dfd3;
  --white: #ffffff;
  --shadow: 0 8px 30px rgba(124, 45, 78, 0.08);
  --radius: 14px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  color: var(--ink);
  background: var(--ivory);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, .serif {
  font-family: "Songti SC", "STSong", "Noto Serif SC", "SimSun", serif;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

a { color: var(--plum); text-decoration: none; }
a:hover { color: var(--plum-light); }
img { max-width: 100%; display: block; }

.wrap { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

/* ---------- 顶部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250, 247, 243, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-bar {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}
.brand { display: flex; align-items: baseline; gap: 10px; }
.brand .logo {
  font-family: "Songti SC", "STSong", "Noto Serif SC", serif;
  font-size: 26px; font-weight: 700; color: var(--plum); letter-spacing: 2px;
}
.brand .tag { font-size: 12px; color: var(--gold); letter-spacing: 1px; }
.nav-menu { display: flex; align-items: center; gap: 6px; list-style: none; }
.nav-menu a {
  display: block; padding: 8px 14px; font-size: 15px; color: var(--ink);
  border-radius: 8px;
}
.nav-menu a:hover { background: var(--cream); color: var(--plum); }
.nav-menu a.active { color: var(--plum); font-weight: 600; }
.nav-menu a.cta {
  background: var(--plum); color: #fff; margin-left: 8px;
  padding: 8px 20px; border-radius: 999px;
}
.nav-menu a.cta:hover { background: var(--plum-dark); color: #fff; }
.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  font-size: 26px; color: var(--plum); padding: 4px 8px;
}

/* ---------- 首页 Hero ---------- */
.hero {
  background:
    radial-gradient(ellipse 60% 50% at 80% 10%, rgba(193, 154, 63, 0.12), transparent),
    radial-gradient(ellipse 50% 60% at 10% 90%, rgba(124, 45, 78, 0.10), transparent),
    linear-gradient(180deg, #fdfaf6 0%, var(--ivory) 100%);
  padding: 72px 0 60px;
  text-align: center;
}
.hero .kicker {
  display: inline-block; font-size: 14px; letter-spacing: 4px;
  color: var(--gold); border: 1px solid var(--gold-light);
  padding: 6px 18px; border-radius: 999px; margin-bottom: 28px;
  background: rgba(255,255,255,0.6);
}
.hero h1 {
  font-size: clamp(40px, 7vw, 68px);
  letter-spacing: 6px;
  color: var(--plum);
  margin-bottom: 22px;
}
.hero .sub {
  font-size: clamp(16px, 2.2vw, 20px); color: var(--ink-soft);
  max-width: 640px; margin: 0 auto 32px;
}
.hero .sub strong { color: var(--ink); }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-source {
  margin-top: 26px; font-size: 14px; letter-spacing: 2px; color: var(--gold);
  display: inline-block; padding: 8px 20px; border-radius: 999px;
  background: rgba(193, 154, 63, 0.10); border: 1px solid var(--gold-light);
}
.btn {
  display: inline-block; padding: 14px 34px; border-radius: 999px;
  font-size: 16px; letter-spacing: 1px; transition: all .25s;
}
.btn-primary { background: var(--plum); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--plum-dark); color: #fff; transform: translateY(-2px); }
.btn-ghost { border: 1px solid var(--plum); color: var(--plum); }
.btn-ghost:hover { background: var(--plum); color: #fff; }

/* ---------- 通用区块 ---------- */
.section { padding: 64px 0; }
.section.alt { background: var(--white); }
.section-head { text-align: center; margin-bottom: 40px; }
.section-head .en {
  font-size: 13px; letter-spacing: 4px; color: var(--gold);
  text-transform: uppercase; margin-bottom: 10px;
}
.section-head h2 { font-size: clamp(26px, 4vw, 36px); letter-spacing: 1px; }
.section-head p { color: var(--ink-soft); margin-top: 12px; max-width: 760px; margin-left: auto; margin-right: auto; }
.gold-rule {
  width: 48px; height: 3px; background: var(--gold);
  margin: 18px auto 0; border-radius: 2px;
}

/* ---------- 卡片栅格 ---------- */
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.card {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 26px 24px;
  transition: all .25s;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--gold-light); }
.card .num {
  font-family: "Songti SC", serif; font-size: 15px; color: var(--gold);
  letter-spacing: 2px; margin-bottom: 12px;
}
.card .icon {
  width: 52px; height: 52px; border-radius: 14px;
  background: linear-gradient(135deg, var(--cream), #fff);
  border: 1px solid var(--line);
  display: flex; align-items: center; justify-content: center;
  font-size: 24px; margin-bottom: 18px;
}
.card h3 { font-size: 20px; margin-bottom: 10px; letter-spacing: 1px; }
.card p { font-size: 14.5px; color: var(--ink-soft); }

/* ---------- 图片占位 ---------- */
.img-ph {
  background:
    repeating-linear-gradient(45deg, #f6efe6, #f6efe6 14px, #f2e9dd 14px, #f2e9dd 28px);
  border: 1px dashed var(--gold);
  border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  color: #a08c5a; font-size: 14px; letter-spacing: 2px;
  text-align: center; padding: 20px; aspect-ratio: 4/3;
}

/* ---------- 品类定义区 ---------- */
.define {
  background: linear-gradient(135deg, var(--plum) 0%, var(--plum-dark) 100%);
  color: #fff; border-radius: 20px; padding: 48px 44px;
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center;
}
.define h2 { color: #fff; font-size: clamp(24px, 3.4vw, 32px); letter-spacing: 2px; margin-bottom: 18px; }
.define p { color: rgba(255,255,255,0.85); font-size: 15.5px; margin-bottom: 14px; }
.define .quote {
  background: rgba(255,255,255,0.1); border-left: 3px solid var(--gold);
  border-radius: 0 10px 10px 0; padding: 18px 22px;
  font-family: "Songti SC", serif; font-size: 19px; color: #fff; letter-spacing: 1px;
}
.define .badge-row { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 8px; }
.define .badge {
  border: 1px solid rgba(255,255,255,0.35); border-radius: 999px;
  padding: 6px 16px; font-size: 13px; color: rgba(255,255,255,0.9);
}

/* ---------- 页头（内页） ---------- */
.page-hero {
  background:
    radial-gradient(ellipse 50% 60% at 85% 20%, rgba(193, 154, 63, 0.10), transparent),
    linear-gradient(180deg, #fdfaf6, var(--ivory));
  padding: 52px 0 36px; text-align: center;
  border-bottom: 1px solid var(--line);
}
.page-hero h1 { font-size: clamp(30px, 5vw, 44px); letter-spacing: 4px; color: var(--plum); }
.page-hero p { color: var(--ink-soft); margin-top: 14px; max-width: 800px; margin-left: auto; margin-right: auto; }
.crumb { font-size: 13px; color: var(--ink-soft); margin-bottom: 16px; letter-spacing: 1px; }
.crumb a { color: var(--ink-soft); }
.crumb a:hover { color: var(--plum); }

/* ---------- 产品卡 ---------- */
.product-card { display: grid; grid-template-columns: 1fr 1fr; gap: 0; overflow: hidden; padding: 0; }
.product-card .info { padding: 32px 34px; }
.product-card .img-ph { border-radius: 0; border: none; }
.product-card h3 { font-size: 24px; margin-bottom: 6px; }
.product-card .role { font-size: 13px; color: var(--gold); letter-spacing: 2px; margin-bottom: 16px; }
.product-card ul { list-style: none; margin-top: 14px; }
.product-card ul li {
  font-size: 14.5px; color: var(--ink-soft); padding-left: 22px; position: relative; margin-bottom: 8px;
}
.product-card ul li::before {
  content: ""; position: absolute; left: 0; top: 10px;
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--gold-light); border: 2px solid var(--gold);
}
.flip .img-ph { order: 2; }

/* ---------- 步骤 ---------- */
.steps { counter-reset: step; }
.step {
  display: flex; gap: 22px; padding: 20px 0; border-bottom: 1px dashed var(--line);
}
.step:last-child { border-bottom: none; }
.step .no {
  counter-increment: step; flex: 0 0 46px; height: 46px; border-radius: 50%;
  background: var(--plum); color: #fff; font-family: "Songti SC", serif;
  display: flex; align-items: center; justify-content: center; font-size: 18px;
}
.step .no::before { content: counter(step); }
.step h3 { font-size: 18px; margin-bottom: 6px; }
.step p { font-size: 14.5px; color: var(--ink-soft); }

/* ---------- 文章 ---------- */
.article-list { display: grid; gap: 16px; }
.article-item {
  display: flex; justify-content: space-between; align-items: center; gap: 20px;
  background: var(--white); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 24px 28px; transition: all .25s;
}
.article-item:hover { box-shadow: var(--shadow); border-color: var(--gold-light); }
.article-item h3 { font-size: 18px; margin-bottom: 6px; }
.article-item p { font-size: 14px; color: var(--ink-soft); }
.article-item .cat {
  flex: 0 0 auto; font-size: 12px; color: var(--gold);
  border: 1px solid var(--gold-light); padding: 4px 12px; border-radius: 999px;
  white-space: nowrap;
}
.article-body { max-width: 760px; margin: 0 auto; }
.article-body h2 { font-size: 24px; margin: 40px 0 16px; letter-spacing: 1px; }
.article-body h3 { font-size: 19px; margin: 28px 0 12px; }
.article-body p { margin-bottom: 16px; color: #443c4b; }
.article-body ul, .article-body ol { margin: 0 0 16px 22px; color: #443c4b; }
.article-body li { margin-bottom: 8px; }
.article-body .callout {
  background: var(--cream); border-left: 3px solid var(--gold);
  padding: 18px 22px; border-radius: 0 10px 10px 0; margin: 24px 0;
}
.article-body .endline {
  text-align: center; font-family: "Songti SC", serif; font-size: 22px;
  color: var(--plum); letter-spacing: 4px; margin: 48px 0 12px;
}
.article-meta { text-align: center; color: var(--ink-soft); font-size: 13px; margin-top: 14px; }

/* ---------- CTA 横幅 ---------- */
.cta-band {
  background: linear-gradient(135deg, var(--plum), var(--plum-dark));
  border-radius: 20px; padding: 44px 40px; text-align: center; color: #fff;
}
.cta-band h2 { color: #fff; font-size: clamp(26px, 4vw, 38px); letter-spacing: 5px; margin-bottom: 14px; }
.cta-band p { color: rgba(255,255,255,0.85); margin-bottom: 24px; }
.cta-band .btn { background: var(--gold); color: #3d2c10; font-weight: 600; }
.cta-band .btn:hover { background: #d4af52; color: #3d2c10; transform: translateY(-2px); }

/* ---------- 页脚 ---------- */
.site-footer {
  background: #241a22; color: rgba(255,255,255,0.65);
  margin-top: 64px; padding: 60px 0 0; font-size: 14px;
}
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 36px; }
.site-footer h4 {
  color: #fff; font-size: 15px; letter-spacing: 2px; margin-bottom: 16px;
  font-family: "Songti SC", serif;
}
.site-footer ul { list-style: none; }
.site-footer li { margin-bottom: 10px; }
.site-footer a { color: rgba(255,255,255,0.65); }
.site-footer a:hover { color: var(--gold-light); }
.footer-brand .logo { font-size: 24px; color: #fff; font-family: "Songti SC", serif; letter-spacing: 3px; }
.footer-brand .slogan { color: var(--gold-light); margin: 10px 0 14px; font-size: 15px; letter-spacing: 2px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1); margin-top: 44px;
  padding: 22px 0; text-align: center; font-size: 12.5px; color: rgba(255,255,255,0.4);
  line-height: 2;
}
.compliance-note { max-width: 860px; margin: 0 auto 8px; }

/* ---------- 响应式 ---------- */
@media (max-width: 960px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .define { grid-template-columns: 1fr; padding: 44px 30px; }
  .product-card { grid-template-columns: 1fr; }
  .flip .img-ph { order: 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 720px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: absolute; top: 68px; left: 0; right: 0;
    flex-direction: column; align-items: stretch;
    background: var(--white); border-bottom: 1px solid var(--line);
    padding: 12px 20px 20px; gap: 2px;
    display: none;
  }
  .nav-menu.open { display: flex; }
  .nav-menu a.cta { margin: 8px 0 0; text-align: center; }
  .grid-4, .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .section { padding: 48px 0; }
  .hero { padding: 52px 0; }
  .footer-grid { grid-template-columns: 1fr; }
  .article-item { flex-direction: column; align-items: flex-start; gap: 10px; }
}